PVC Glue ?

kwgozy · #1 12/30/2007, 03:27 PM

I am using schedule 40 & 80 fittings and Flex PVC. Is teflon tape good enough on the threaded fittings?

What should I use for the slip fittings, silicon, PVC glue ect? Going to start plumbing as soon as I receive some advice.

Thanks Kyle

RokleM · #2 12/30/2007, 03:34 PM

More like you're starting tomorrow because Savko is closed

Yes, teflon tape is fine for the threads. The liquid teflon works as well (thick paste that you put on the threads).

Although SpaFlex will technically work with many standard PVC glue in a pinch, it's not recommended. Weld-On 795 is what I use for both rigid and SpaFlex. Savko has it in stock. I haven't been able to find it anywhere else in Columbus.

geo · #3 12/30/2007, 03:35 PM

Hi Kyle,
Teflon tape is good for the threaded fittings. PVC cement for all of the socket connections.

Reefdiver72 · #4 12/30/2007, 05:06 PM

Lowes has a glue that is made for the spaflex also.

RokleM · #5 12/30/2007, 05:18 PM

Do you recall the brand/name?

itZme · #6 12/30/2007, 05:39 PM

Probably something to this effect... >>>LINK<<<
"Formulated to withstand pressures and vibrations commonly associated with spa and swimming pool installations."

Easily Distracted · #7 12/30/2007, 10:51 PM

Now.... to prime or not to prime Spaflex......

haggarse · #8 12/30/2007, 11:24 PM

I've always primed. My understanding is priming simply cleans any pvc and makes the surface more bondable. I am not aware of any negative affects from priming flex?*?*

itZme · #9 12/31/2007, 12:13 AM

Quote:

Originally posted by Easily Distracted
Now.... to prime or not to prime Spaflex......

The instructions for that glue say "Step 4. Clean pipe and fitting with a listed primer"

walmart · #10 12/31/2007, 01:04 AM

Make sure you do it in a well ventilated room or outside. That stuff is nasty!

Easily Distracted · #11 12/31/2007, 02:47 AM

Quote:

Originally posted by itZme
The instructions for that glue say "Step 4. Clean pipe and fitting with a listed primer"

For some reason it's still contested. The guy at Savko actually called the solvent makers and they said not to prime it (I think it attacks the flex PVC more than regular PVC). He said the instuctions said to do it and they admitted that they weren't sure. He suggested the only way to tell is to do a side by side with flex PVC and fittings. After drying, split the fitting and peel it away and see if one has better surface contact than the other. Apparently the glue does not actually bond the two surfaces by co-mingling them, but actually melts the surfaces so they mate perfectly and hold on to each other. He said if you split the fitting they should just peel apart. Either way, I would clean the flex PVC with at least soap and water. Eventually I'm gonna test it.

RokleM · #12 12/31/2007, 07:59 AM

I've always primed my spaflex (never had one fail), but that's just me. I've never heard before it could cause issues, but anything is possible. The bigger issue I hear discussed is the twist vs straight insert. Some claim that if you do a twist on spaflex like you would normal pipe, it dries in a stressed state. Who knows.

hemi18 · #13 12/31/2007, 08:40 AM

I use spaflex on my tank and i used to build pools back in the day and we ALWAYS primed and twisted our fittings and i do the same now. use the light blue bottle, in a pinch use the red, but other than that, it's basically the same thing...and also remember that we're not dealing with any REAL pressure here so let's not overthing stuff too much...

jh2pizza · #14 12/31/2007, 11:31 AM

I prefer using just a little silicone on all threaded fittings. Tighten hand tight and never have micro bubbles.